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r <br /> GROUND ZERO ANALYSIS, INC. <br /> 1714 Main Sti eet <br /> Escaton,Cabrornia 95320 <br /> Telephone (209)838-9888 r <br /> Faesunde (209)838-9883 r-a <br /> c� <br /> k = ` <br /> Apnl 28, 2000 } <br /> Mr Jeffrey Wong -� <br /> San Joaquin County Public Health Services, <br /> Environmental Health Division µ <br /> 304 E Weber Ave , 3rd FI <br /> Stockton, CA 95202 <br /> Subject Groundwater Monitor ing Well Installation Report <br /> Speedy Mart Groundwater and Soil Investigation <br /> 8200 N Highway 99 (corner of Frontage Road and Foppiano Lane), Morada, CA <br /> Dear Mr Wong <br /> Ground Zero Analysis, Inc (Ground Zero) is subrrutting this report to summarize the drilling and <br /> installation of four groundwater monitoring wells and two soil borings, and to present the analytical <br /> results of soil and groundwater samples collected during the investigation at the subject site (Figure 1) <br /> The work was conducted at the request of the San Joaquin County Public Health Services, <br /> Environmental Health Division (PHS/EHD) to determine the impact to groundwater from <br /> contaminants previously documented at the site <br /> PHYSICAL SETTING <br /> The subject site is located at 8200 N Highway 99 (corner of Frontage Road and Foppiano Lane), <br /> Morada, CA (Figure 1) The subject area is bounded by a vacant field to the east, Foppiano Lane <br /> to the south, Frontage Road and Highway 99 to the west, and a field and residences to the north <br /> The area is primarily agricultural with the closest residential tract located approximately 250 feet <br /> north of the site <br /> The subject site is located in the southern portion of the Sacramento Basin, a part of the northern <br /> section of the Great Valley The Great Valley consists of marine sediments deposited during the <br /> Cretaceous Period These deposits are overlain by sands, silts, and gravels of the Tertiary Period, <br /> and Quaternary alluvium, derived from the Sierra Nevada The Great Valley extends from Red <br /> Bluffin the north to the Transverse Ranges to the south <br /> The topography of the area is relatively flat The ground surface in the vicinity of the site <br /> generally slopes gently to the west, with an elevation of approximately 32 feet above mean sea <br /> growndzo.4ukbur&ACtirpt doc <br />